VYPR
Unrated severityNVD Advisory· Published Feb 26, 2021· Updated Aug 3, 2024

CVE-2021-23969

CVE-2021-23969

Description

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

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Affected products

40

Patches

Vulnerability mechanics

References

8

News mentions

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